Umbrella stand



FIG. 1 is a perspective view of an umbrella stand showing my new design, with the rear portion being omitted for convenience of illustration;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof; and,

FIG. 4 is a side elevational view, with the opposite side elevational view being a mirror image thereof. 

The ornamental design for an umbrella stand, as shown and described. 